package com.hmdp.handler;

import com.hmdp.dto.UserDTO;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
public class LoginHandler implements HandlerInterceptor {

    /**
     * 请求之前
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 判断是否需要拦截 （ThreadLocal中是否有用户）
        if (UserHolder.getUser() == null) {
            // 没有，需要拦截，设置状态码
            response.setStatus(401);
            // 拦截
            return false;
        }
        UserDTO user = UserHolder.getUser();
        log.info("当前登录用户:{}",user.getNickName());
        // 有用户则放行
        return true;
    }
}
